HouseChalk
IC-rated fixtures
IC-rated fixtures are recessed lights approved for direct contact with insulation without creating a fire hazard.
Why it matters
Non-IC-rated fixtures require clearance from insulation, creating gaps that leak conditioned air and reduce energy efficiency.
Where people get this wrong
IC-rated means insulation contact is safe. It does not mean the fixture is airtight. Look for IC and AT (airtight) rated together for best performance.
Real-world example
Recessed lights are installed in the ceiling below the attic. IC-rated cans allow the blown-in insulation to cover them completely without overheating.
Where this hits your build
This affects comfort, energy costs, and indoor air quality. It gets locked behind drywall, so decisions here need to be right before finishing starts.
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